Method of cutting can-heads or other sheet-metal blanks.



F. RUDOLPHI. METHOD 0E CUTTING GAN HEADS oE-oTHEE SHEET 'METAL BLANES.

Patented May 18, 1909.

APPLICATION FILED JAN.13,1908.

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rags from the sheet in a staggered arrangement .UNITED STATES AInArEntr Omron.

i FRANK RUDOLPHI, or CHICAGO, ILLINOIS, AssIeNoR 'ro AMERICAN cAN COMPANY, OFNEW YORK, N. Y., A CORPORATION or NEW IERsEY.

Specification of Letters Patent.

Patented May 18, 1909.

Aiipncauon med January 1s, isos. serial Np. 410,484.v

To all whom it may concerm Be it knownthat I, FRANK RUDOLPHI, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Methods of Cuttin Can-Heads or other Sheet-Metal Blanks, o which the following is a specification.

My invention relates to the cutting of can heads .or other sheet metal blanks from tin plate or other sheets by gangs of dies.

The object of my invention is to provide a method or process by which can heads or other blanks may be cut from sheets by gangs of dies economically or with a mimmum quantity of waste material between lthe canheads or blanks and at the margins of the sheet, and in which one and the same press or gang of dies may be used for making the several successivecutsl To accomplish this result, the can heads or blanks are cut in three successive cuts, one third of the blanks at each stroke by gangs of dies arranged in odd numbered groups or multiples thereof, the sheet being reversed end for end between the irst andsecond strokes or cuts and slipped ory adjusted lengthwise.

for the third cut.

j Figure 1 is a plan view re resenting a sheet after the rst cutor stro e of an odd numbered gang or group of staggered dies, three in number. Fig. 2 represents the same sheet after it has been turned end for end and received the second cut from the same odd numbered group or-g'ang of staggered dies. Fig. 3 represents the same sheet after 1t has b een sli ped or adjusted lengthwise and received the third cut frornthe same odd numbered gang or group of staggered dies. Fig. 4 represents a sheet after 1t has received the first, Second and third cuts from a gang of dies containing a multi le or four of such lodd numbered grou s o dies. F1g.5 represents a gang or group oi)odd numbered stag ered dies. i

In the rawing, A represents a gang of .odd numb'red stag ered dies, which, for

convenience, I havei ustrated as being composed of three dies.

B representsv asheet from which can heads or other circularblanks are to be cut. The circles 1y represent .the can kheads or blanks cut from the sheetby the first stroke. After the first stroke, the sheet B is turned end for end and placed under, the same' gang of dies A and the can heads or blanks 2-2-2 therefrom at the second stroke.

Then the sheet is sli ped or adjusted length wise and at the thir stroke of the press, the remaining three` heads or blanks 3-3-3 are' cut therefrom. ,'By this means, all the can heads or blanks may beY cut from the the same press, an Aequal number of blanks being cut at each stroke' of the press. Y

The group or gang of dies may be com'- posed of any odd number or of any multiple of any odd number. For example, in Flg. 4 of the drawing, I have illustrated a sheet as cut by a multiple of four times three or twelve dies, the same constituting in fact i four adjacent odd numbered gangs or groups of three each.

I claim 5 Y 1. The method other blanks from metal `or other sheets consisting 4in cutting an equal number of blanks at three successlve strokes of an odd numbered group or gang of dies in staggered ar-y rangement, reversing the sheet between the first --and second strokesA and adjusting it 'lengthwise between the second and third strokes said first, second and third cuts being each'and all made by' successive strokes of one and the same gang of staggered dies, substantially as specified.

' 2. The method of cutting can heads or other blanks from metal or other sheets in staggered arrangement from one and the same gang of dies, an equal number of blanks.

being cut specified.

3. The method of cutting can heads or other blanks from-metal or other sheets in staggered arrangement from one and the same gang of dies, consisting in first cutting one third ofthe blanks in staggered arrange- ,at each stroke, substantially as of cutting can heads or i sheet on three successive strokes of one and the Q n 922,194 i ment from the sheet, then reversin the sheet l at each stroke, the number of blanks cut at and cutting a. .second third of lt e blanks each stroke being either an odd number or a from the sheet by a second stroke ofthe same multiple' thereof, substantiallngs s ecified. 10 gang of dies and then adjusting the sheet and FRANK R OL HI.

f cutting the remaining third of blnks from Witnesses:

the sheet by a third stroke ofthe same gang H, M. MUNnAY, ofdies, an equal number of blanks being cut PEARL ABBAMS. 

